A SED-based approach to predict the fatigue strength of notched and plain shot-peened parts

Author:  M. Benedetti1, M. Bandini2, S. Raghavendra1, V. Fontanari1, and F. Berto3 1 Department of Industrial Engineering, University of Trento, Italy 2 PeenService, Bologna, Italy 3 Dep. of Mechanical and Industrial Engineering, Norwegian University of Science an
Source:  ICSP14 Milan
Doc ID:  2022086
Year of Publication:  2022
Abstract A Strain Energy Density (SED) based fatigue criterion is developed to incorporate residual stresses (RS). Mechanical and residual stresses are treated separately. The formers are encapsulated in the form of SED associated to stress range and maximum SED. The work done when tensile mechanical strains fluctuate in the presence of compressive RS is added to the equivalent SED of the fatigue criterion. This is calibrated and validated using the results of an extensive experimental campaign aimed at exploring the effect of shot-peened induced RS on plain and notch fatigue strength of Al-7075-T651. Keywords Strain energy density; Notch fatigue assessment; Residual stresses; Shot peening.

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